tick: Detect and fix jiffies update stall
stable inclusion from stable-v5.10.193 commit ae4f109b954d0ac0130b2934da7d79b950d5f5b7 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I9399M Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=ae4f109b954d0ac0130b2934da7d79b950d5f5b7 -------------------------------- commit a1ff03cd upstream. On some rare cases, the timekeeper CPU may be delaying its jiffies update duty for a while. Known causes include: * The timekeeper is waiting on stop_machine in a MULTI_STOP_DISABLE_IRQ or MULTI_STOP_RUN state. Disabled interrupts prevent from timekeeping updates while waiting for the target CPU to complete its stop_machine() callback. * The timekeeper vcpu has VMEXIT'ed for a long while due to some overload on the host. Detect and fix these situations with emergency timekeeping catchups. Original-patch-by:Paul E. McKenney <paulmck@kernel.org> Signed-off-by:
Frederic Weisbecker <frederic@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
sanglipeng <sanglipeng1@jd.com>
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